Familiar with the wooly, a classic that should be in every fly box IMO ! Have you tied the griffiths gnat? Very similar in appearance , you have pics ? Sometimes I like using off the wall materials … picked up a book here in Co That had a nymph pattern utilizing a rubber band for the body and herl around the head and throat OMG with that rib and segmentation Pattern it’s one of the most life like I’v seen called “rubber band nymph “